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Statement: Threshold energy of a reactio...

Statement: Threshold energy of a reaction is independent of temperature.
Explanation: The energy of activation however decreases with increase in temperature.

A

(a) `S` is correct but `E` is wrong

B

(b) `S` is wrong but `E` is correct

C

(c ) Both `S` and `E` are correct and `E` is correct explanation of `S`

D

(d) Both `S` and `E` are correct but `E` is not correct explanation of `S`.

Text Solution

Verified by Experts

The correct Answer is:
D
`-do-`
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The rate of reaction increases with increase in activation energy.

What happens to most probable kinetic energy and the energy of activation with increases in temperature?

Knowledge Check

  • According to collision theory for determining the variation of rate of reaction with temperature the rate constant, k= Ae^(-Ea//RT). For most of the practical purposes A and E_(a [Arrhenius factor and Activation energy] are temperature independent. However they may vary slightly. Assuming the conditions given above answer the following questions. "If"A=K,T"and"E_(a)=K_(2)T^(2) and the given equation is still applicable where K_(1)"and" K_(2) are the constant and T represent temperature then which will be correct option? (P) The maximum value of k will be equal to A (Q) At lower temperature rate of reaction will increase with increase in temperature (R) At higher temperature, rate of reaction will decrease with increase in temperature

    A
    All are true
    B
    Only Q and R are incorrect
    C
    Only P is incorrect
    D
    Only P and Q are incorrect

  • At a given temperature, the energy of activation of two reactions is same if

    A
    the specific rate constant for the two reactions is the same
    B
    the temperature coefficient for the two reactions is the same
    C
    `Delta`H for the two reactions is same but not zero
    D
    `DeltaH` for the two reactions is zero.

  • STATEMENT-1: pH of water decreases with increase in temperature. STATEMENT-2 : K_(w) of water decreases with increase in temperature.

    A
    Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-5
    B
    Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-5
    C
    Statement-1 is True, Statement-2 is False
    D
    Statement-1 is False, Statement-2 is True

    • Similar Questions

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    At a given temperature, the energy of activation of two reaction is same if

    On increasing temperature, activation energy for a reaction decrease. Why?

    On increasing temperature, activation energy for a reaction decrease. Why?

    Statement-1 : Many endothermic reactions that are not spontaneous at room temperature become spontaneous at high temperatures. Statement-2: Energy of the system increases with increase in temperature.

    Assertion (A) : Rate of reaction will be doubled, when temperature increased from 298 k to 308 k. Reason (R ): The activation energy of reaction decreases with increase in temperature.

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